<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .c1{
            /*color也可以用rgb颜色*/
            color: red;
            /*字体大小*/
            font-size: 18px;
            /*加粗*/
            font-weight: 600;
            /*字体*/
            font-family: "Cambria Math";
        }
    </style>
</head>
<body>
<div class="c1">
    中国电信
</div>
</body>
</html>